Goodwill and Identifiable Intangible Assets, Net (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Asset Impairment Charges [Abstract]
Impairment charges	$ 0	$ 0	$ 0
Amortization of identifiable intangible assets	40,505	32,698	27,082
Goodwill	$ 592,114	$ 464,392	$ 332,447
Walker
Asset Impairment Charges [Abstract]
Fair values in excess of carrying value (as a percent)	32.00%
Goodwill	$ 96,800

Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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